This is what the inside of the Hyperloop tube looks like

A start-up working on Elon Musk's Hyperloop idea just shared a glimpse of what it's like inside the tube of the futuristic railway.

The LA-based company Hyperloop Technologies posted a picture on Twitter on Wednesday showing off the insides of its Hyperloop development tube.

Check out the image below.

Hyperloop Technologies is just one of the companies trying to bring the Hyperloop to life.

The Hyperloop is basically an advanced rail system that allows people to travel in capsules through tubes at speeds surpassing 500 miles per hour. Musk originally proposed the idea two years ago as a quick, safe, and energy efficient way to travel between San Francisco and Los Angeles. He made all of his research open source and since then several private companies have been working on commercializing the technology.

Hyperloop Transportation Technologies (HTT), another company working on building a Hyperloop system, is planning on breaking ground on a five-mile test track later this year.